Supplemental Effect of Cholyltaurine and Taurine to a Defatted Soybean Meal-based Diet on Hepatopancreatic Histology in Red Sea Bream <I>Pagrus major</I>

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  • 大豆油粕主体飼料へのタウロコール酸およびタウリンの添加がマダイの生理障害に及ぼす影響
  • ダイズ アブラカス シュタイ シリョウ エ ノ タウロコールサン オヨビ タウリン ノ テンカ ガ マダイ ノ セイリ ショウガイ ニ オヨボス エイキョウ

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Abstract

A feeding experiment was conducted to examine the supplemental effect of cholyltaurine and taurine to a defatted soybean meal-based diet on the hepatopancreatic histology of red sea bream Pagrus major. Five diets, a control fish meal-based diet (FM), defatted soybean meal based diet (SBM), and SBM supplemented with 0.5% cholyltaurine (SBM+C), 0.2% taurine (SBM+T) and both cholyltaurine and taurine (SBM+C+T), were fed to red sea bream for 6 weeks. Feeding SBM diet led to growth retardation and the hepatocytes of fish fed this diet were atrophied. In exocrine portion of the pancreas, atrophied adenocytes, degenerated zymogen granules and decreased number of red blood cells were observed. While in fish fed diets SBM+C and SBM+T, some improvements were found in the morphological features of hepatocytes and the growth of fish fed diet SBM+T was improved. Fish fed the SBM+C+T diet showed the approximated growth performance and certain improvements in the features of exocrine portion of the pancreas as well as comparable histological features of the liver relative to fish fed the FM diet. The results suggest that cholytaurine and taurine supplementation is effective for mitigation of low growth performance and histological abnormalities in the hepatopancreas of this fish induced by feeding SBM.

Journal

  • Aquaculture Science

    Aquaculture Science 62 (2), 137-146, 2014

    Japanese Society for Aquaculture Science

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